зеркало из https://github.com/mozilla/gecko-dev.git
124 строки
4.1 KiB
C++
124 строки
4.1 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 2001
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Mike Pinkerton <pinkerton@netscape.com>
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* Gus Verdun <gustavoverdun@aol.com>
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* Kathleen Brade <brade@comcast.net>
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* Mark Smith <mcs@pearlcrescent.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/* Things To Do 11/8/00
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Check image metrics, can we support them? Do we need to?
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Any other render format? HTML?
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*/
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#include "nsError.h"
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#include <windows.h>
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#include "nsCOMPtr.h"
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#include "imgIContainer.h"
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#include "nsIInputStream.h"
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//
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// nsImageToClipboard
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//
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// A utility class that takes an imgIContainer and does all the bitmap magic
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// to allow us to put it on the clipboard
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//
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class nsImageToClipboard
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{
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public:
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nsImageToClipboard ( imgIContainer* inImage );
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~nsImageToClipboard();
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// Call to get the actual bits that go on the clipboard. If |nsnull|, the
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// setup operations have failed.
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//
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// NOTE: The caller owns the handle and must delete it with ::GlobalRelease()
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nsresult GetPicture ( HANDLE* outBits ) ;
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private:
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// Computes # of bytes needed by a bitmap with the specified attributes.
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PRInt32 CalcSize(PRInt32 aHeight, PRInt32 aColors, WORD aBitsPerPixel, PRInt32 aSpanBytes);
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PRInt32 CalcSpanLength(PRUint32 aWidth, PRUint32 aBitCount);
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// Do the work
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nsresult CreateFromImage ( imgIContainer* inImage, HANDLE* outBitmap );
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nsCOMPtr<imgIContainer> mImage; // the image we're working with
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}; // class nsImageToClipboard
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struct bitFields {
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PRUint32 red;
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PRUint32 green;
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PRUint32 blue;
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PRUint8 redLeftShift;
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PRUint8 redRightShift;
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PRUint8 greenLeftShift;
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PRUint8 greenRightShift;
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PRUint8 blueLeftShift;
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PRUint8 blueRightShift;
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};
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//
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// nsImageFromClipboard
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//
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// A utility class that takes a DIB from the win32 clipboard and does
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// all the bitmap magic to convert it to a PNG or a JPEG in the form of a nsIInputStream
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//
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class nsImageFromClipboard
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{
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public:
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nsImageFromClipboard () ;
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~nsImageFromClipboard ( ) ;
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// Retrieve the newly created image
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nsresult GetEncodedImageStream (unsigned char * aClipboardData, const char * aMIMEFormat, nsIInputStream** outImage);
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private:
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void InvertRows(unsigned char * aInitialBuffer, PRUint32 aSizeOfBuffer, PRUint32 aNumBytesPerRow);
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nsresult ConvertColorBitMap(unsigned char * aInputBuffer, PBITMAPINFO pBitMapInfo, unsigned char * aOutBuffer);
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void CalcBitmask(PRUint32 aMask, PRUint8& aBegin, PRUint8& aLength);
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void CalcBitShift(bitFields * aColorMask);
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}; // nsImageFromClipboard
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